133511450221 has 8 divisors (see below), whose sum is σ = 137613573504. Its totient is φ = 129454654560.

The previous prime is 133511450213. The next prime is 133511450243. The reversal of 133511450221 is 122054115331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133511450221 - 2³ = 133511450213 is a prime.

It is a super-2 number, since 2×133511450221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133511450221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133511450521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11325925 + ... + 11337706.

It is an arithmetic number, because the mean of its divisors is an integer number (17201696688).

Almost surely, 2^133511450221 is an apocalyptic number.

It is an amenable number.

133511450221 is a deficient number, since it is larger than the sum of its proper divisors (4102123283).

133511450221 is a wasteful number, since it uses less digits than its factorization.

133511450221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22663811.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 133511450221 its reverse (122054115331), we get a palindrome (255565565552).

The spelling of 133511450221 in words is "one hundred thirty-three billion, five hundred eleven million, four hundred fifty thousand, two hundred twenty-one".